If you run the Emergency Recovery Utility (ERU.EXE in the \other\misc\eru folder on the Windows 95 CD-ROM disc) and save the recovery files to diskette, the Registry's SYSTEM.DAT won't be saved due to lack of space. Look at ERU's list of Files to Be Saved and then click the Custom button to examine the complete file list. Save SYSTEM.DAT and other unchecked files to a backup directory on the hard drive, so you'll have them when you need them.